[INFO] fetching crate mutringbuf 0.5.4... [INFO] testing mutringbuf-0.5.4 against beta-2025-10-28 for beta-1.92-2 [INFO] extracting crate mutringbuf 0.5.4 into /workspace/builds/worker-1-tc2/source [INFO] started tweaking crates.io crate mutringbuf 0.5.4 [INFO] removed 0 missing examples [INFO] removed 0 missing tests [INFO] finished tweaking crates.io crate mutringbuf 0.5.4 [INFO] tweaked toml for crates.io crate mutringbuf 0.5.4 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate mutringbuf 0.5.4 on toolchain beta-2025-10-28 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate mutringbuf 0.5.4 already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 52aa221e384fe40c0034d8fc4cc89332dcd202bb40fbf3d09d4e393f51eab462 [INFO] running `Command { std: "docker" "start" "-a" "52aa221e384fe40c0034d8fc4cc89332dcd202bb40fbf3d09d4e393f51eab462", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "52aa221e384fe40c0034d8fc4cc89332dcd202bb40fbf3d09d4e393f51eab462", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "52aa221e384fe40c0034d8fc4cc89332dcd202bb40fbf3d09d4e393f51eab462", kill_on_drop: false }` [INFO] [stdout] 52aa221e384fe40c0034d8fc4cc89332dcd202bb40fbf3d09d4e393f51eab462 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3c1fe5e7176bf277e6cfa8fd7e34b06453278a504a8881f64f989cff76d0f186 [INFO] running `Command { std: "docker" "start" "-a" "3c1fe5e7176bf277e6cfa8fd7e34b06453278a504a8881f64f989cff76d0f186", kill_on_drop: false }` [INFO] [stderr] Compiling crossbeam-utils v0.8.21 [INFO] [stderr] Compiling mutringbuf v0.5.4 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.39s [INFO] running `Command { std: "docker" "inspect" "3c1fe5e7176bf277e6cfa8fd7e34b06453278a504a8881f64f989cff76d0f186", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3c1fe5e7176bf277e6cfa8fd7e34b06453278a504a8881f64f989cff76d0f186", kill_on_drop: false }` [INFO] [stdout] 3c1fe5e7176bf277e6cfa8fd7e34b06453278a504a8881f64f989cff76d0f186 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5aa88bce1aae4e2dc30eb3ea239667016b481d860a24fe076dc307cb00004f54 [INFO] running `Command { std: "docker" "start" "-a" "5aa88bce1aae4e2dc30eb3ea239667016b481d860a24fe076dc307cb00004f54", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.101 [INFO] [stderr] Compiling unicode-ident v1.0.19 [INFO] [stderr] Compiling rustix v1.1.2 [INFO] [stderr] Compiling bitflags v2.9.4 [INFO] [stderr] Compiling semver v1.0.27 [INFO] [stderr] Compiling libc v0.2.176 [INFO] [stderr] Compiling anstyle v1.0.13 [INFO] [stderr] Compiling gungraun-runner v0.17.0 [INFO] [stderr] Compiling serde_json v1.0.145 [INFO] [stderr] Compiling gungraun v0.17.0 [INFO] [stderr] Compiling cfg-if v1.0.3 [INFO] [stderr] Compiling regex-lite v0.1.7 [INFO] [stderr] Compiling rustc_version v0.4.1 [INFO] [stderr] Compiling gungraun-macros v0.7.0 [INFO] [stderr] Compiling quote v1.0.41 [INFO] [stderr] Compiling syn v2.0.106 [INFO] [stderr] Compiling proc-macro-error-attr2 v2.0.0 [INFO] [stderr] Compiling terminal_size v0.4.3 [INFO] [stderr] Compiling clap_builder v4.5.48 [INFO] [stderr] Compiling clap v4.5.48 [INFO] [stderr] Compiling proc-macro-error2 v2.0.1 [INFO] [stderr] Compiling serde_derive v1.0.228 [INFO] [stderr] Compiling derive_more-impl v2.0.1 [INFO] [stderr] Compiling divan-macros v0.1.21 [INFO] [stderr] Compiling tokio-macros v2.5.0 [INFO] [stderr] Compiling divan v0.1.21 [INFO] [stderr] Compiling tokio v1.47.1 [INFO] [stderr] Compiling derive_more v2.0.1 [INFO] [stderr] Compiling serde v1.0.228 [INFO] [stderr] Compiling bincode v1.3.3 [INFO] [stderr] Compiling mutringbuf v0.5.4 (/opt/rustwide/workdir) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 36.31s [INFO] running `Command { std: "docker" "inspect" "5aa88bce1aae4e2dc30eb3ea239667016b481d860a24fe076dc307cb00004f54", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5aa88bce1aae4e2dc30eb3ea239667016b481d860a24fe076dc307cb00004f54", kill_on_drop: false }` [INFO] [stdout] 5aa88bce1aae4e2dc30eb3ea239667016b481d860a24fe076dc307cb00004f54 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 24e65dad2d88462b3f24d410a50e1142a86754d387002128f897653cb6ac6fc9 [INFO] running `Command { std: "docker" "start" "-a" "24e65dad2d88462b3f24d410a50e1142a86754d387002128f897653cb6ac6fc9", kill_on_drop: false }` [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mutringbuf-e5cf71ea146d545a) [INFO] [stdout] [INFO] [stdout] running 4 tests [INFO] [stdout] test iterators::sync_iterators::cons_iter::test::cached_avail ... ok [INFO] [stdout] test ring_buffer::storage::stack::test::from_tests ... ok [INFO] [stdout] test iterators::sync_iterators::prod_iter::test::cached_avail ... ok [INFO] [stdout] test ring_buffer::storage::heap::test::from_tests ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s [INFO] [stdout] [INFO] [stderr] Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-54a242c79860b64b) [INFO] [stdout] [INFO] [stdout] running 33 tests [INFO] [stdout] test common::new_buf::test_new_buf ... ok [INFO] [stdout] test sync_tests::cons_tests::test_pop_avail_nw_exact ... ok [INFO] [stdout] test common::uninit_buf::test_uninit ... ok [INFO] [stdout] test sync_tests::cons_tests::test_pop_ref_exact ... ok [INFO] [stdout] test sync_tests::cons_tests::test_pop_slice_copy ... ok [INFO] [stdout] test sync_tests::cons_tests::test_pop_slice_exact ... ok [INFO] [stdout] test sync_tests::cons_tests::test_pop_slice_seam ... ok [INFO] [stdout] test sync_tests::detached_work_tests::test_work_detached ... ok [INFO] [stdout] test sync_tests::detached_work_tests::test_work_detached_set_index ... ok [INFO] [stdout] test sync_tests::detached_work_tests::test_work_detached_sync_index ... ok [INFO] [stdout] test sync_tests::detached_work_tests::test_work_go_back ... ok [INFO] [stdout] test sync_tests::drop::cons_drop_test ... ok [INFO] [stdout] test sync_tests::drop::drop_everything ... ok [INFO] [stdout] test sync_tests::cons_tests::test_pop_exact ... ok [INFO] [stdout] test sync_tests::integration_tests::test_push_work_pop_single ... ok [INFO] [stdout] test sync_tests::integration_tests::test_push_work_pop_slice ... ok [INFO] [stdout] test sync_tests::integration_tests::test_reset ... ok [INFO] [stdout] test sync_tests::drop::work_drop_test ... ok [INFO] [stdout] test common::stack::test_local_stack ... ok [INFO] [stdout] test sync_tests::drop::prod_drop_test ... ok [INFO] [stdout] test sync_tests::prod_tests::test_push_mut_ref ... ok [INFO] [stdout] test sync_tests::prod_tests::test_push_mut_ref_init ... ok [INFO] [stdout] test sync_tests::prod_tests::test_push_slice ... ok [INFO] [stdout] test sync_tests::work_tests::test_work_exact ... ok [INFO] [stdout] test sync_tests::work_tests::test_work_mul ... ok [INFO] [stdout] test sync_tests::work_tests::test_work_single ... ok [INFO] [stdout] test sync_tests::prod_tests::test_push_one_by_one ... ok [INFO] [stdout] test len_zero_stack - should panic ... ok [INFO] [stdout] test len_zero_heap - should panic ... ok [INFO] [stdout] test common::stack::fibonacci_test_stack ... ok [INFO] [stdout] test sync_tests::concurrent_fib::fibonacci_test ... ok [INFO] [stdout] test sync_tests::multithreading::test_mt_non_workable ... ok [INFO] [stdout] test sync_tests::multithreading::test_mt_workable ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 33 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 6.12s [INFO] [stdout] [INFO] [stderr] Doc-tests mutringbuf [INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel [INFO] [stderr] --> src/lib.rs:1:18 [INFO] [stderr] | [INFO] [stderr] 1 | #![cfg_attr(doc, feature(doc_cfg))] [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error: aborting due to 1 previous error [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0554`. [INFO] [stderr] error: doctest failed, to rerun pass `--doc` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-10-28-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2024 --crate-type lib --color auto --crate-name mutringbuf --test src/lib.rs --test-run-directory /opt/rustwide/workdir -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --warn=unexpected_cfgs --check-cfg 'cfg(cpal)' --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-100482555ca574f5.rlib --extern divan=/opt/rustwide/target/debug/deps/libdivan-8535ae62678824f2.rlib --extern gungraun=/opt/rustwide/target/debug/deps/libgungraun-4b476ac7a5e1dc1b.rlib --extern libc=/opt/rustwide/target/debug/deps/liblibc-7a54cdb917ea7291.rlib --extern mutringbuf=/opt/rustwide/target/debug/deps/libmutringbuf-6caa4e41ca2977f6.rlib --extern tokio=/opt/rustwide/target/debug/deps/libtokio-5bc7d007e729a00f.rlib -C embed-bitcode=no --cfg 'feature="alloc"' --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("alloc", "async", "default", "vmem"))' --cap-lints=warn --error-format human` (exit status: 1) [INFO] [stderr] note: test exited abnormally; to see the full output pass --no-capture to the harness. [INFO] running `Command { std: "docker" "inspect" "24e65dad2d88462b3f24d410a50e1142a86754d387002128f897653cb6ac6fc9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "24e65dad2d88462b3f24d410a50e1142a86754d387002128f897653cb6ac6fc9", kill_on_drop: false }` [INFO] [stdout] 24e65dad2d88462b3f24d410a50e1142a86754d387002128f897653cb6ac6fc9